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Hatch coaming with overall strength completely reckoned in and hatch longitudinal girder of bulk cargo ship

A technology for hatches and coamings, applied in the direction of hull decks, hulls, ship parts, etc., can solve problems that cannot be included in the overall longitudinal strength of hull girders, discontinuous structure types, and dangers of hatch coamings, and achieve weight reduction, Effects of improving fatigue life and increasing stiffness

Active Publication Date: 2017-05-31
708TH RES INST OF CSSC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The longitudinal hatch coamings of traditional bulk carriers are generally designed as a discontinuous structure, and the total longitudinal strength of the hull girder cannot be included in the calculation of the rules
The reality is that the hatch coamings have a small part to contribute to the overall strength, which is too conservative for the main hull structure compared to reality, and dangerous for the hatch coamings themselves
In addition, the height of the hatch girders of traditional small and medium-sized bulk carriers is generally too high, resulting in the entire topside tank sloping plate being slightly closer to the neutral axis, and at the same time losing part of the cargo hold volume

Method used

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  • Hatch coaming with overall strength completely reckoned in and hatch longitudinal girder of bulk cargo ship
  • Hatch coaming with overall strength completely reckoned in and hatch longitudinal girder of bulk cargo ship

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Embodiment approach

[0023] In further embodiments of the present invention, please continue to refer to figure 1 As shown, the longitudinal hatch coaming 1 forms an inverted trapezoidal groove 11 at the transverse bulkhead.

[0024] In a further embodiment of the present invention, since the longitudinal hatch coaming 1 is continuous along the ship's length direction, the longitudinal hatch coaming 1 is fully included in the total strength.

[0025] In a further embodiment of the present invention, the selection of the material of the longitudinal hatch coaming 1 and the main deck 2 according to the change of the elastic yield limit is illustrated. If the material of the main deck 2 is H36 steel, then the longitudinal hatch coaming 1 adopts H47 steel ; if the main deck 2 is made of H32 steel, the longitudinal hatch coaming 1 is made of H40 steel.

[0026] In a further embodiment of the present invention, the continuous feature of the longitudinal hatch coaming 1 also improves the shear resistanc...

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Abstract

The invention discloses a hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of a bulk cargo ship. The hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of the bulk cargo ship comprise a longitudinal hatch coaming body and a hatch longitudinal girder body. The longitudinal hatch coaming body is continuous in the length direction of the ship, the material elasticity yield limit of the longitudinal hatch coaming body is increased by 16% relative to that of a main deck, and the height of the longitudinal hatch coaming body is reduced to 600 mm or below at an athwartship bulkhead; the height of the hatch longitudinal girder body is smaller than that of a traditional hatch longitudinal girder. By means of the hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of the bulk cargo ship, the rigidity of a ship girder structure can be improved, the fatigue life of a hatch corner is prolonged, the capacity of a cargo hold is increased, and the structural weight of a longitudinal member in the cargo hold area is averagely reduced by 3% or above.

Description

technical field [0001] The invention relates to the technical field of hatch coaming, in particular to a bulk carrier hatch coaming and a ship's girder. Background technique [0002] The longitudinal hatch coamings of traditional bulk carriers are generally designed as a discontinuous structural type, and the total longitudinal strength of the hull girder cannot be included in the calculation of the rules. The reality is that the hatch coamings contribute a small part to the overall strength, which is too conservative compared to reality for the main hull structure and dangerous for the hatch coamings themselves. In addition, the height of the hatch girders of traditional small and medium-sized bulk carriers is generally too high, which causes the entire topside tank sloping plate to be slightly closer to the neutral axis, and at the same time loses part of the cargo hold volume. Contents of the invention [0003] In view of the above-mentioned problems, the object of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B19/08B63B3/54
CPCB63B3/54B63B19/08
Inventor 谢小龙李文华宋杨李福军邱伟强
Owner 708TH RES INST OF CSSC
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